Ziggurat boss becomes unkillable - with steps & tests

Update

After playing more of Ziggurat, I noticed that the "Melee" part of VLS was making a hit sound when the boss goes into it's add phase.

I then decided to try putting my VLS in the edge of the room so only the projectiles will deal damage, and so far I haven't run into the problem where the boss becomes invulnerable.

So I'm guessing the Melee hit from VLS is causing the issue.

I'm currently playing a perma VLS build and i spamming it in the edge of the room, so i dont think "insane amount of damage" is the issue.

Just happened to me. Nice to see this was posted in 2024 and not fixed. RIP giga juiced t17 map because I portaled out in boss arena instead of logging out.

happened to me with forbidden rite poison just now

Just happened to me. Can you fix this already? It's been known for over a year